I need someone to explain this to me.

A New Approach to Robotic Walking Looks More Like Kinetic Art

Flipping Robot

Here’s a really cool application of 3D printing and robotics by a fellow named [Maundy] – He’s created a very unique kinetic robot which relies on gravity to walk around.

All the electronics are housed in the cylinder as shown above. It can roll freely back and forth by some kind of mechanism inside (not shown), but the beauty of it is, when the cylinder rolls to one end, gravity takes over and the little robot actually flips through the air, reorienting itself onto its other feet.

Due to the flipping nature of the bot, it can even climb over small obstacles with ease – but this one can’t steer, so there’s no threat of them taking over the world. Perhaps with a modification to the control cylinder (turn it into a ball), the robot could orientate itself vertically, and then kind of spin in place in order to steer…

Anyway, you have to see it to believe it, so stick around after the break to see it in action!

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Cosmonaut Or Taikonot: Vote For The Most Outrageous Component

We have a new round of Astronaut or Astronot, the little community voting thing we’re doing for The Hackaday Prize. Why should you care? Because tomorrow (Friday, 10:00 AM Eastern) we’re doing a voters lottery. We’re selecting a random person on hackaday.io, and if that person has voted, they win a pretty awesome bench power supply.

Why are we telling you this now? Because voting in previous rounds doesn’t count for this round. If you want to nab a power supply, you need to vote. We previously gave away an awesome scope, and a very cool 3D printer to a random person on hackaday.io. Judging from previous rounds, I’d guess the odds of us giving away the supply this week are pretty good, but I’m not doing those maths right now. I’ll post a video of the drawing tomorrow around 10:30 Eastern.

Adding GPIOs To The Raspberry Pi With The Camera Interface


The Raspberry Pi Model B+ was just released, and now everyone who picks one of those up has a few more GPIO pins to play around with. For the millions of people with the two-year-old version of the Pi, we’re still stuck with the same old, same old: 17 GPIOs on the big header, and that’s about it as far as toggling pins goes.

The Broadcom SoC on the Pi has far more GPIO pins than are broken out on the large header, and a few of those go to the CSI camera interface. These GPIOs can be broken out with a few flat cables (Portuguese, Google Translatrix), giving you four more GPIOs, and this technique can also be used with the new, expanded Model B+.

The CSI camera connector has two I²C lines that go directly to the camera, controllable in Linux as GPIO0 and GPIO1. There are two more GPIO connectors on the CSI connector controllable as GPIO5 and GPIO21. By carefully slicing and soldering wires to a flat cable, these GPIO lines can be broken out onto a breadboard.

There’s a video below demonstrating these GPIO lines being used to control a few LEDs. Of course, anything that is possible with a normal Raspi GPIO is possible with the CSI connector GPIO lines.

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THP Hacker Bio: Kenji Larsen


I met up with [Kenji Larsen] at HOPE X last weekend, and I’m fairly certain he was the coolest person at a conference full of really cool people. Talking to him for a little bit, you get a sense of what it would be like to speak with [Buckmister Fuller], [Tesla], or any of the other ‘underappreciated, but not by people in the know’ minds scattered about history. I’ll just let his answers to our hacker bio questions demonstrate that.

7033431402348237268[Kenji]‘s project for The Hackaday Prize is the Reactron Overdrive. It’s not just one board he’s building here, but an entire suite of sensors, interfaces, and nodes that form a complete human to machines – note the plural ‘machines’ – interface. When you consider that no one knows what the Internet of Things actually is, and that [Kenji] is working on IoT 3.0, you get a sense that there’s really something here. Also, his project log has a Tron Recognizer in it. That has to count for something, right?

Interview/Bio below.

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20,000 Hackers


What a pleasant thing to wake up and realize that we now have more than 20,000 Hackers on Hackaday.io. It wasn’t even two months ago that we celebrated passing the 10k mark. While we’re talking numbers, how about 2,075 projects, and 148 hackerspaces?

But what’s in a number? It’s what this stands for that really gets us excited! You took the leap and decided to show off what you’re working on while you’re still working on it. This is the key to pollinating ideas. One concept can result in many awesome spin-off projects. So if you haven’t yet written about that killer idea bouncing around in your head, do it now and be the inspiration for the next iteration of amazing hacks.

Much more to come

Our crew has been refining an overhaul of how the feed works to make it easier to know when and how your favorite hackers are updating their builds. You should see that functionality live in August. We’re also working on improving interactivity so that you can better find others with similar interests whether it’s just for casual conversation or to undertake an epic build as a team.

We’re certainly not above pointing out our own weaknesses. The Stack never took off. The idea seemed like a good one, but we need your help figuring out how to make it shine. Leave a comment below telling us what you think The Stack should be and how you think it should work.

A Lesson in Blind Reverse Engineering – Signals Intelligence

spread sheet of binary data

In a fit of desperation, I turned to data mining tools and algorithms, but stepped back from the horror of that unspeakable knowledge before my mind was shattered. That way madness lies.

–[Rory O'hare]

Wise words. Wise words, indeed. Who among us hasn’t sat staring into the abyss of seemingly endless data without the slightest clue to what it means or even how to go about figuring out what it means? To literally feel the brain damage seeping in as you start to see ‘ones’ and ‘zeros’ reach out to you from every day electronic devices…like some ghost in the wires. But do not fear, wise hacker! For we have good news to report! [Rory O'hare] has dived into this very abyss, and has emerged successful.

While others were out and about playing games and doing whatever non-hackers do to entertain themselves, [Rory O'hare] decided to reach out and grab some random wireless signals for a little fun and excitement. And what he found was not just a strong, repeating signal at 433Mhz. Not just a signal that oozed with evidence of ASK. What he found was a challenge…a mystery that was begging to be solved. A way to test his skill set. Could he reverse engineer a signal by just looking at the signal alone? Read on, and find out.




Fantastic Tach Is Strangely Called Tachtastic

tachtastic diy tachometer

We all have projects from yesteryear that we wish had been documented better. [EjaadTech] is fighting back by creating a project page about a tachometer he built 3 years ago while in college. He’s done a great write-up documenting all the steps from bread-boarding to testing to finished project. All of the code necessary for this tachometer is available too, just in case you’d like to make one yourself.

At the heart of the project is an AVR ATMega8 chip that performs the calculations and controls the LCD output screen that displays both the immediate RPM as well as the average. To hold everything together, [EjaadTech] etched his own custom PCB board that we must say looks pretty good. In addition to holding all the necessary components, there is also an ISP connector for programming and re-programming.

There are two attachment options for sensing the RPM. One is a beam-break style where the IR emitter is on one side of the object and the receiver is on the other. This type of sensor would work well with something like a fan, where the blades would break the IR beam as they passed by. Then other attachment has the IR emitter and receiver on one board mounted next to each other. The emitter continually sends out a signal and the receiver counts how often it sees a reflection. This works for rotating objects such as shafts where there would not be a regular break in the IR beam. For this reflective-based setup to work there would have to be a small piece of reflective tape on the shaft providing a once-per-revolution reflection point. Notice the use of female headers to block any stray IR beams from causing an inaccurate reading… simple and effective.